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A tooth (pl.: teeth) is a hard, calcified structure found in the jaws (or mouths) of many vertebrates and used to break down food.Some animals, particularly carnivores and omnivores, also use teeth to help with capturing or wounding prey, tearing food, for defensive purposes, to intimidate other animals often including their own, or to carry prey or their young.
The plural may be used to emphasise the plurality of the attribute, especially in British English but very rarely in American English: a careers advisor, a languages expert. The plural is also more common with irregular plurals for various attributions: women killers are women who kill, whereas woman killers are those who kill women.
These nouns undergo i-umlaut in the dative singular and the nominative/accusative plural. This is the source of nouns in Modern English which form their plural by changing a vowel, as in man ~ men, foot ~ feet, tooth ~ teeth, mouse ~ mice, goose ~ geese, and louse ~ lice.
Mesiodens: Mesiodens is an extra tooth that grows behind the front teeth. A mesiodens may push the front teeth apart to make room for itself thus creating a gap between the front teeth. [3] 4. Skeletal discrepancy: Dental skeletal discrepancy can be a cause behind gap teeth. If the upper jaw grows more than the lower jaw, teeth on the upper jaw ...
Universal numbering system. This is a dental practitioner view, so tooth number 1, the rear upper tooth on the patient's right, appears on the left of the chart. The Universal Numbering System, sometimes called the "American System", is a dental notation system commonly used in the United States. [1] [2]
R : designates the central tooth or the rachis tooth (in case of lack of central tooth : the zero sign 0) the lateral teeth on each side are expressed by a specific number or D, in case the outer lateral tooth is dominant. the marginal teeth are designated by a specific number or, in case they are in a very large numbers, the infinity symbol ∞
Hippos have even been known to attack boats for encroaching upon their habitat, and they can use their sharp teeth that grow up to 20 inches long very effectively. They attack by biting, and ...
Nouns and adjectives ending in a dental fricative usually have /θ/: bath, breath, cloth, froth, health, hearth, loath, mouth, sheath, sooth, tooth/teeth, width, wreath. Exceptions are usually marked in the spelling with a silent e : tithe, lathe, lithe with /ð/. blithe can have either /ð/ or /θ/. booth has /ð/ in England but /θ/ in America.